Don't somke until the plane takes off 这句主语是什么?

Don't somke until the plane takes off 这句主语是什么? Don't somke here 的同义句是否no smoking here请问可以not smoking here吗？ don't trouble trouble until trouble troubles 有主从句的反义疑问句按什么判断?例：I don't think everyone is late,___.I told him not to somke,__. I don’t allow ______ in my office.I don’t allow my family ______ at all.A.to smoke;somkingB.smoking;to somkeC.to somke;to somkeD.somking;somking为什么选B?理由是什么? 英语选择题i'd like to ,___ you don't want to go there all by yourself.A.until B.but C.if D.after选哪个,并翻译i'd like to ,___ you don't want to go there all by yourself.A.until B.but C.if D.after整个题目应该是would you like to go th The children___leave school __five school A.I,till B.don't,until C.didn't,until D.not,until last year my father didn't somke anymorelast year my father didn't somke anymore 怎么改同义句? the tired children don't get home until 7pm I will love you until you don't love don;t leave until l get there的意思 英语翻译Don't trouble trouble until trouble troubles you. 敬请翻译：Don't trouble trouble until trouble troubles you! Don’t leave until he____________（return）RT Don't get off the bus until it____(stop). Don't trouble trouble until trouble troubles you Don't trouble trouble until trouble troubles you 翻译 Don't troublt trouble until troublt troubles you翻译